Kenmore model 665 dishwasher detergent door

Hello, I just got a kenmore model 665 dishwasher from a person who was moving and found that when I run it the detergent door does not open. I’ve read through your other forums about the springs and such and it appears that I probably have an electrical or an actuator problem. I was hoping you could help with info on how to test the dispenser actuator manually and how to make sure the timer is sending the proper current to the dispenser? Any advice or info you can provide would be greatly appreciated.

Thanks in advance.